# SDR X2ZR2026061401625

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 9, 2026
- Submitted: September 14, 2026
- Operation: General aviation
- Filed by: [Turbine Standard Ltd, repair station X2ZR927X](https://openairdocs.org/faa-repair-station/X2ZR927X/turbine-standard-ltd.md) (OpenAirDocs)
- Aircraft: CFEQW
- Make and model: Dorner DO228201
- Aircraft serial: 8103
- Aircraft time: 28,781 hours, 32,723 cycles
- Engine: Garrtt TPE3315
- Engine time: 17,947 hours, 17,917 cycles
- System (JASC): [7200 · Engine (Turbine/Turboprop)](https://openairdocs.org/jasc/7200)
- Part: Bull Gear
- Part number: 8937396
- Part serial: 98P26429
- Condition: Failed
- Location: Engine
- Component: Spur & Helical, Hnywl
- Component part number: 310703718
- Stage of operation: CR
- How discovered: O
- Nature of condition: T, C, Y
- Precautionary procedure: E
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/X2ZR2026061401625

## Discrepancy

ENGINE WAS RECEIVED POST IN-FLIGHT EMERGENCY. DISASSEMBLY REVEALED THAT THE BULL GEAR  SEPARATED AND BROKE THROUGH THE ACCESSORY DRIVE HOUSING. THE DEBRIS WAS THEN INGESTED THROUGH THE INLET AND TRAVELED THROUGH THE ENTIRE GAS PATHWAY CAUSING DAMAGE THROUGHOUT THE ENGINE.

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